I am not a user but I see you do have to create a user account on mundo's website:
http://radio.mundu.com/
My guess would be it might be tied to that. Have you read any of the documentation that usually is designed to answer questions like this? The user manual, a
FAQ page at the site, etc????
This is from their FAQ page:
Make sure that you're entering the same user id you provided during the Mundu Radio registration process.
SteveTaz